Portion of a shoe



FIG. 1 is a side elevational view of a portion of a shoe showing my new design;

FIG. 2 is a perspective view thereof;

FIG. 3 is a rear elevational view thereof; and,

FIG. 4 is a top plan view thereof.

The broken line showing of the remaining portion of the shoe in FIGS. 1-4 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a portion of a shoe, as shown and described. 